Call Search
     

New to Ham Radio?
My Profile

Community
Articles
Forums
News
Reviews
Friends Remembered
Strays
Survey Question

Operating
Contesting
DX Cluster Spots
Propagation

Resources
Calendar
Classifieds
Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers

Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement
About eHam.net

   Home   Help Search  
Pages: [1]   Go Down
  Print  
Author Topic: Yaesu DMU-2000 Need advice from owners, have few quesions....  (Read 3909 times)
VE3PLO
Member

Posts: 158




Ignore
« on: December 08, 2011, 10:49:30 AM »

I am looking at purchasing one, and have few questions. I like the idea that it will control my rotor, and show other really usefull/useless stuff Smiley))
I have few questioins for the owners of that gizmo:

1. Are you satisfied with the performace of the unit? Would you have bought it again? Considering that HRD does most of this stuff.

2. The display resolution, what is it?? can it be changed?

3. Scope, can you listen to your radio on 14.100 and view 14.200-14.350 on the scope???

4. What kind of keyboard did you use? Do most of the stuff you do with the DMU consists of using the buttons on the radio, or the DMU???
Logged
VE3FMC
Member

Posts: 983


WWW

Ignore
« Reply #1 on: December 10, 2011, 04:25:53 PM »

I am looking at purchasing one, and have few questions. I like the idea that it will control my rotor, and show other really usefull/useless stuff Smiley))
I have few questioins for the owners of that gizmo:

1. Are you satisfied with the performace of the unit? Would you have bought it again? Considering that HRD does most of this stuff.

2. The display resolution, what is it?? can it be changed?

3. Scope, can you listen to your radio on 14.100 and view 14.200-14.350 on the scope???

4. What kind of keyboard did you use? Do most of the stuff you do with the DMU consists of using the buttons on the radio, or the DMU???


Hi Dan

For the money you will spend on a DMU-2000 you could buy a new FT-950 for a back up rig. I know where I would invest my money considering I use HRD here. It would not be towards that DMU unit  Smiley

73, Rick VE3FMC
Logged
KG6YV
Member

Posts: 505




Ignore
« Reply #2 on: December 12, 2011, 01:52:29 PM »

If you are intending to use the DMU on an FT-2000 or FT-950 and primarily are interested in the specrum scope there are several better solutions. 

1. No you cannot change the resolution on the DMU, it is what it is.
2. If you already own a computer an SDR radio connected to the Yaesu at the first IF would be far superior. 

I use an RF Space SDR-IQ SDR and the IF2000 board that RF Space sells for the FT-2000 and 950.  You have one USB cable to your computer, one serial cable to the radio a simple 5 minute software setup on the PC and you go...190 khz
maximum band width and complete control from your PC.  High resolution screens (same as any other application on the PC)
and a very slick spectrum along with waterfall display.  If you want to see it in action go to YouTube and type in SDR-IQ.

FYi,

Greg
Logged
K8AC
Member

Posts: 1465




Ignore
« Reply #3 on: December 15, 2011, 05:54:21 AM »

Very good advice from KG6YV.  There are other good reasons to go with the PC based approach.  I also use an SDR-IQ, along with SpectraVue software.  I have a monitor mounted immediately above my rig and have the SpectraVue window sized so that just the spectrum display is shown, leaving lots of room on the monitor for my logging program windows (DXLab).  Depending on the modes you use and your personal preferences, you'll want to be able to adjust the FFT parameters to meet your requirements.  Typically, the hardware only approaches offer a single configuration that is a poor example of what can be achieved (check out the IC-7800 for a good example of that).

If you're really interested in a panadaptor, stay away from software that claims to provide that function on it's own.  While such programs can show you that there is some activity on the band (or was, a while ago when the scan was made), they're not in the same universe as a real-time panadaptor.  For all other functions, a good logging program handles what you mentioned and isn't limited for example, to rotors manufactured by one or two companies. 

Regarding listening at one place on the band and viewing another place: Typically, the pandaptor solutions let you look at up to a 190 KHz span at any point in time.  That span will be centered on the frequency you have the rig tuned to.  If you really want to run it such that you are looking at a frequency as far removed as you stated from the tuned frequency, you can always run an SDR-IQ using an antenna splitter and tune it and the rig separately.  Of course, then you would not have the two slaved together frequency-wise.  And, when running that way instead of from an IF tap, you'll have to consider limiting the input signal to the SDR-IQ and maybe providing a ground on the input depending on how you derive the split signal. 

There used to be a free demo from FlexRadio where you could download PowerSDR and a demo recording and play with the software just as if it were in real operation.  That would give you a good idea of how you can manipulate the scan, etc. to meet your needs.  There's a great deal of similarity between PowerSDR and SDR-IQ when it comes to the spectrum display and after playing with that, you'll likely not consider the DMU again.
Logged
Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.11 | SMF © 2006-2009, Simple Machines LLC Valid XHTML 1.0! Valid CSS!